There's a simple word game that was recently conceived. This wasn't tested at all. On the plus side, it's very easy to get components to play.
 

Materials:
Scrabble or bananagram pieces with letters. You can make your own letters with squares of paper, and you may store it in an envelope, but that's more work. Consider visibility, because these letters are publicly visible to other players. The other component is pieces of paper - I picture strips - which have secret 6-7-letter words.
 

Here's a quick and dirty description:
You get letters from the draw pile or trading, your letters are publicly visible. You have a secret word, you win if you spell it. Your word letters can be from your letters, or someone else, as long as someone else's letter is part of their secret word.
 
 
 

BETTER LETTER

There are secret words, 6-7 letters long, on strips of paper. You can do this by making the words by yourself (giving you a bit of an advantage), having everyone toss in some words, or something else ("optional").

There are at least four players. More players are better because you get overlap with needed letters. You've got a draw pile of letters that are upside down. Players start with zero letters. Each player is given a secret word, e.g., TURKEY, CARROT, SAFETY, WARTHOG.

A player's "hand" is that player's letters. A player can have a maximum of seven letters per hand. These letters are publicly visible to all players.

During your turn you can A) Draw a letter from the draw pile or B) trade.
You can draw a letter from the draw pile and either exchange it for one of your letters or put it back in the draw pile. If you have fewer than seven letters you do not put letters back in the draw pile.
You can trade one of your letters with one letter from another willing player. If you fail to make the trade, you can still take a letter from the draw pile instead.

A player wins if he has the letters to spell his secret word during his turn. The letters for the word could include other players' letters, as long as the letter is part of other player's secret words. For example, you have TURQEYM (turkey), and you also point to the K in Ralph's letters. However, the K is not part of Ralph's secret word ("WARTHOG") which he does not have to reveal.

If a player announces that he can spell his word but fails, as in the above example, the player puts his letters back in the draw pile, and starts again with a new secret word.

Any player can restart during any of his or her turns, as long as the player has a hand of seven letters. The player replaces the secret word with a new secret word, and restarts with zero letters.